The Respiratory System

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Across
  1. 2. Can also be known as the windpipe
  2. 4. You have two of these
  3. 8. The sheet of muscle under the lungs
  4. 9. The opposite of exhale
  5. 10. A gas breathed in
Down
  1. 1. A gas breathed out (6,7)
  2. 3. An air sac at the end of the Respiratory system
  3. 5. A model used to illustrate the respiratory system (4,3)
  4. 6. Provides protection to the lungs (3,4)
  5. 7. The useful product of respiration